Weft thread suction device in looms



Jan. 20, 1970 J. PICANOL WEFT THREAD SUCTION DEVICE IN LOOMS 2 Sheets-Sheet 1 Filed March 8, 1968 INVENTOR. J. Pica/7o! ollpkwehg- A'v'romu ias Jan. 20, 1970 7 J. P'ICAN OL 3,49

WEFT THREAD SUCTION DEVICE IN LOOMSI Filed March 8, 1968 2 Sheets-Sheet 2 (I arm I I INVENTOR. J Pi c cu n 0 Z BY ATTOYLN S55 Int. 01. 603.1 45/26 US. Cl. 139-247 2 Claims ABSTRACT OF THE DISCLOSURE A weft thread suction device for looms has a cylindrical chamber and a suction inlet formed in a wall of this chamber. Simple means are provided to adjust the axis of this inlet relatively to the axis of the chamber.

It is well known to use, in looms, a weft thread suction device, namely in front of the magazine feeding the changing mechanism.

The same device may also suck up the ends of weft threads at right angles with the temples.

Generally, this suction device comprises a chamber having a prismatic axis, the suction pipe leading to the level of the bottom of said chamber and being externally provided with a means promoting the disposition of the ends of weft threads for their suction or their retention.

The ends of the weft threads recovered when a pirn is exhausted within the said chamber form rapidly an intermingling which, under some circumstances, may promote the retention of the subsequent weft threads. However, it has been observed that, principally owing to the more and more increasing performances of the looms, the known suction devices had some drawbacks and that some of their elements, namely at the inlet, were unnecessarilyintricate.

' The present invention relates to improvements introducing, in the said suction devices, a substantial simplification increasing both the efficiency and the working rapidity.

In this respect, the improvements according to the invention comprise essentially providing the inlet of the usual chamber in the form of a simple opening disposed at a level higher than that of the bottom of the chamber, said chamber being mounted so that the said opening is in front or approximately in front of the feeding magazine of the changing device.

Another feature of this invention consists in that the axis of the said opening is preferably .oriented to promote the turbulence in the chamber.

Another feature of the invention comprises condition ing the abutting edges of the said opening for varying or adjusting the orientation .of its axis.

These improvements have still the advantage of maintaining as usually within the chamber an additional inlet projected by a pipe leading to the cutting device at right angles with the temples.

These features are described hereafter without any limitation in an embodiment with reference to the enclosed drawings in which:

FIGURE 1 shows as diagrammatically as possible a portion of the loom indicating the location of the suction device.

3 UnitedSt ates Patent O M 3,490,499 Patented Jan. 20, 1970 FIGURE 2 shows diagrammatically the essential constituting elements of the improved suction device according to the invention;

FIGURE 3 is a radial section with a partial front view of the chamber to which are particularly applied the improvement according to the invention;

FIGURE 4 is a section on the line IV-IV of FIGURE 3.

In these drawings, the suction device is shown diagrammatically by the proper suction chamber 1, the motor pump unit 2, the suction pipe 3 connecting the top of lid 4 of the said chamber 1 at the inlet of the pump of unit 2. At the bottom of the said chamber 1, is disposed an inlet 5 projected by a flexible hose 6 leading to the vicinity of the loom'tables (not shown).

The chamber 1 comprises substantially a bottom 7, the said lid 4 and a cylindrical body 8 generally made of a transparent material. A prismatic axis 9 is fastened through its lower end at the center of bottom 7 and it is projected up to a distance from the upper edge of the cylindrical body 8. The lid 4 has an outlet tubing 10 which is connected, through a flexible hose 11, with the said pipe 3 leading to the pump.

According to the essential characteristic of the invention, the cylindrical body 8 has, at a height H, an'opening 12 disposed in such manner that, when the said chamber is set in position, the said opening is disposed in front of the magazine 13 containing the pirns 14 feeding the underlying changing mechanism (not shown).

The said opening 12 is preferably outlined by a ring 15 having a spherical external surface, said ring being mounted in a frame consisting of two small plates 16-17 disposed on both sides of the corresponding portion of the wall of the tubular element 8, these plates having coaxial ports outlined by spherical surfaces so that the said ring 15 is fastened thereto with a more or less tight fit. This arrangement allows to modify or to adjust very correctly the position of axis AB of the said opening 12 to bring it to a standstill in the most favorable position for forming air jets having a maximum efliciency. This adjustment will be made within predetermined limits +a-ot which are largely sufiicient for any eflicient position of the said axis A-B of the suction opening.

With these means, not only the construction has been substantially simplified, but the efficiency of the suction device has been also increased. Effectively, the weft threads shown in 18 and coming from magazine 13 of the changing device must be simply presented in front of the said opening 12 They are strongly and instantaneously sucked up.

Of course, any suitable relative shape, dimension and position may be given to the said opening. In addition, the said opening may be outlined as well by a fixed wall as by any wall having a suitable configuration to be adjusted or brought to a standstill in a correct position.

The invention relates to the assembly of the so improved suction device as well as to the chamber itself considered individually.

What I claim is:

1. A weft thread suction device for looms, comprising a chamber having cylindrical walls, a bottom and a lid, means supplying subatmospheric pressure to the interior of the chamber and means constituting a suction inlet to said chamber, the last-mentioned means comprising a direct passage extending through a cylindrical wall of spherical outer surfaces and supporting means fixed to said wall, said ring being mounted with a tight fit insaid supporting means.

2. A device in accordance with claim 1, wherein said supporting means comprise two plates located opposite each other on said wall and having coaxial portions with spherical surfaces mating the spherical surfaces of said ring.

References Cited UNITED STATES PATENTS Turner 139--247 Turner 139247 Hooper et a1 139247 Turner 139-247 Turner 139247 10 JAMES K. CHI, Primary Examiner 

